A fire destroyed an oceanfront Geoffroy Drive home on Sunday night, and the cause is considered suspicious due to a partially nude woman — reported missing earlier in the day — found on the back deck, Central Fire Protection District officials said.

The cliff-top home was vacant and is used as a vacation home, Central Fire inspector Mike DeMars said.

Firefighters received a call from a neighbor about 10 p.m. and arrived to find flames shooting through the roof of the two-story Craftsman-style home and a partially nude, incoherent young woman staring at the fire from the back deck, DeMars said.

Firefighters said when they arrived, 20-foot flames were jumping out of the roof and a partially naked 19-year-old woman was standing on the deck of the house, staring at the fire.

The topless teenager, whose name was not released, was incoherent and she was taken to Dominican Hospital to be evaluated. She was later taken into custody for questioning, however, investigators did not say if she was considered a suspect.

The beach house is owned by a Fresno man, Dennis Parnagan, who uses it while vacationing in Santa Cruz. Parnagan walked with firefighters around the charred remains of his beach house on Monday, and said he hopes to rebuild it.